Modelling for degreasing the mining equipment downtime by optimizing blasting period at Erdenet surface mineKhavalbolot Kyelgyenbai, Serhii Pysmennyi, Serhii Chukharev, Batbolor Purev and Ijilmaa JambaaE3S Web Conf., 280 (2021) 08001DOI: https://doi.org/10.1051/e3sconf/202128008001